package com.zcfe.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zcfe.reggie.common.CustomException;
import com.zcfe.reggie.entity.Category;
import com.zcfe.reggie.entity.Dish;
import com.zcfe.reggie.entity.Setmeal;
import com.zcfe.reggie.mapper.CategoryMapper;
import com.zcfe.reggie.service.CategoryService;
import com.zcfe.reggie.service.DishService;
import com.zcfe.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    @Autowired  //菜品service
    private DishService dishService;
    @Autowired  //套餐service
    private SetmealService setmealService;
    /**
     * 根据id删除分类,删除之前需要进行判断
     * @param id
     */
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> dishlqw=new LambdaQueryWrapper<>();
        //添加查询条件,根据分类id进行查询
        dishlqw.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(dishlqw);
        //查询当前分类是否关联菜品,如果已经关联,抛出一个业务异常
        if (count1>0){
                //已经关联,抛出一个业务异常
            throw new CustomException("当前分类下关联了菜品,不能删除");
        }
        //查询当前分类是否关联套餐,如果已经关联,抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setlqw=new LambdaQueryWrapper<>();
        setlqw.eq(Setmeal::getCategoryId,id);
        int count2= setmealService.count(setlqw);
        if (count2>0){
                //已经关联,抛出一个业务异常
            throw new CustomException("当前分类下关联了套餐,不能删除");
        }
        //正常删除分类
        super.removeById(id);
    }
}
